Method of weaving



Patented. Nov. ll, i924. I

RANDOLPH CBOMPTON, 0F W'QR-CE-STER, MASSACHUSETTS.

METHOD OF 'WEAVING.

No Drawing.

To all "LU/1077b it may o nccm Be it known that I, RANDOLPH CnoMrroN, a citizen of the United States, and a resident of Worcester, in the county of .Vorcester and State of Massachusetts, have invented an Improvement in Methods of Weaving, of which the following description is a Specification.

My invention pertains of a method of weaving having among its objects the elimination of waste and the employment of simpler mechanism than has heretofore been found practicable and will be bestunderstood from the following specification describing by way of illustration one specific manner of employing my method, while the scope of my invention will be particularly pointed out in the appended claims.

Heretofore in using looms of the type wherein the weft carrier is automatically transferred it is common practice to en1- ploy in connection with the loom a feeler mechanism which is intended to cause the weft carrier to be transferred when it is exhausted. As a matter of fact, however, it is not practical to absolutely exhaust the weft, the feeler mechanism causing the transfer when. about, eight piclrs remain upon the carrier. After thisstage is reached the carriers are cleaned of the remaining weft and are then rewound. In the aggregate the loss of weft incident to this method is considerable especially in mills employing a large number of looms and further although in some cases the method is eminently practical yet in many cases the application of the feeler mechanism to the loom results in an objectionable complexity of mechanism. It is among the objects of my invention to eliminate both the waste and complexity of mechanism incident to this method.

In carrying out my method I employ in connection with the automatic loom a measuring device which will cause the weft carriers to be transferred after a predetermined number of picks have been removed therefrom, the number of picks removed being the same for each carrier and the operation being distinguished from the method which employs feeler mechanism in that the transfer is not dependent upon the number of picks remaining upon the carrier.

As measuring devices for causing the weft carriers to be transferred after a definite number of picks have been removed Application filed August a, 1922. Serial no. 579,532.

therefrom are known, it is believed unnecessary to describe one;

l'leretofore it has been impossible to put into practice automatic loomsequipped with measuring devices because of the great loss of weft incident to their use. A measuring device will cause transfer of the carrier as heretofore stated after a predetermined number of picks have been removed and owing principally to the unavoidable stretch in the weft in the weaving operation it is impossible to determine how to set the measuring device so that the carriers will be transferred when nearly exhausted. For this reason measuring devices in spite of their simplicity over feeler devices have not been used in practice.

According to my invention I first wind the carriers in a universal winding machine and then select a number of carriers, say for example one lnuidred, which by inspection represent those turned out by the wind ing machine as having a minimum number of picks thereon. I then make a test run with these carriers and by measurement of the fabric woven and counting of the picks determine what I may expect to be the minimum number of picks on a carrier. The measuring device on the loom is then set to cause the loom to transfer the carriers after a number of picks considerably less than this minimum have been removed from the carriers, this of course allowing for stretch and for any carrier which by chance may contain less picks than what has been shown by my test weave. It will be noted that my carriers are as a result of this transferred with a considerable amount of weft thereon, say as many as sixty or seventy picks, as distinguished from the method now in practice whereby the carriers are transferred with eight or less picks thereon. A further step in my method consists in taking the transferred carriers back to the universal winding machine and without cleaning them tying the loose ends of the remaining weft thereon to the reservoir of weft in the winding machine and winding an amount of weft thereon equal to that which the measuring device on the loom is set to cause to be removed. In other words the winding machine is set to wind a length of weft equal to that which the measuring device on the loom is set to remove, consequently each individual carrier may always be returned to the loom with substantially the same amount of weft thereon.

It will be noted by my method that not only am I enabled to employ the much simpler measuring device but that waste of weft is absolutely eliminated.

Although I have described for purposes of illustration one way of carrying out my method it is to 'be understood that I am not limited thereby to its exact details but that Wide deviations may be made there from without departing from the spirit of my invention.

Claims:

1. That method of weaving 011 looms having measuring devices for causing transfer of bobbins after a predetermined number of picks, comprising Winding the weft upon a series of bobbins; selecting a large number of such wound bobbins; making a test run with all said bobbins; determining the number of picks in the resulting woven fabric; thus determining the minimum number of picks on a bobbin; then setting the measuring device to cause transfer after a number of picks considerably less than said minimum, thereby allowing for stretch of the weft; then placing the transferred bobbins in a winding machine and tying the loose end of the weft remaining on such bobbins to the supply in said winding machine; then winding on each bobbin an amount of weft equal to that which the measuring device upon the loom is set to function at; and finally weaving with said rewound carriers.

2. That method of weaving on bobbin changing looms having measuring devices for eifectingthe transfer of bobbins after a predetermined number of picks as indicated by said measuring device, comprising, winding a series of bobbins in a winding machine; selecting a relatively large number of wound bobbins determined by inspection to have a minimum number of picks wound thereon; then making a test run with all of said bobbins; then measuring the resulting woven fabric and counting the picks, thereby determining the minimum number of picks on the carrier; then setting the measuring device to cause transfer after a number of picks relatively less than the determined minimum, thereby allowing for stretch, etc.; then placing the discharged bobbins in a winding machine and tying the loose end of the weft remaining on said bobbins to the reservoir of weft in said machine; then winding an amount of weft onto each bobbin equal to that which the measuring device on the loom is set to function at,

- and finally weaving with said rewound bobbins and thereafter repeating the series of operations.

3. That method of weaving on bobbin changing looms having measuring devices for transferring the bobbins after a predetermined number of picks as indicated by said measuring device, which comprises winding a large number of bobbins in a socalled universal winding machine; then selecting approximately one hundred wound bobbins which by inspection have a minimum number of picks wound thereon; then making a test run with all of said carriers; then measuring the resulting woven fabrics and counting the picks, thus determining the minimum number of picks upon a carrier; then setting the measuring device to cause transfer after a number of picks considerably less than said minimum, thereby allowing for stretchof the weft, etc. thus resulting in transfer with fifty or more picks left upon each bobbin; then placing the discarded bobbins in the so-called universal winding machine and tying the loose end of the weft remaining on said carriers to the weft supply in said winding machine, and. winding an amount of weft upon each of said bobbins equal to that which the measuring device on the loom is set to function at; and then weaving with such bobbins.

In testimony whereof; I have signed my name to this specification.

RANDOLPH CROMPTON. 

